Windows Instructions:

Mac OS X Instructions:

After downloading, the installer should launch automatically and create an icon on the desktop.

The installer is a standard PackageMaker installer packaged inside a disk image. The operating system should recognize the files and launch the installer automatically.

If the installer doesn’t start on its own:
Double click on the installation file jPDFAssemble-macos.dmg to mount the disk image, then double click on the mounted image.
Finally double click on the installer.